<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .one{
            border: 1px solid black;
            padding: 20px;
            color:red;
            background-color: #009678;
        }
    </style>
    <script src="jquery.js"></script>
    <script>
        function addclass(){
            $("li:eq(1)").addClass("one")
        }
        function removeclass(){
            $("li:eq(1)").removeClass("one")
        }
    </script>
</head>
<body>
    <h2>热门动画排行</h2>
    <button onclick="addclass()">添加样式</button>
    <button onclick="removeclass()">删除样式</button>
    <ul class="animationList">
        <li>名侦探柯南</li>
        <li>阿拉蕾</li>
        <li>海贼王</li>
    </ul>
</body>
</html>